Two chemicals considered harmful to babies remain in Johnson & Johnson's baby shampoo sold in the U.S. and some other countries, even though the company already makes versions without them, according to an international coalition of health and environmental groups.

Now the coalition is urging consumers to boycott Johnson & Johnson baby products until the company agrees to remove the chemicals from its baby products sold around the world.

The Campaign for Safe Cosmetics has unsuccessfully been urging the world's largest health care company for 2 1/2 years to remove the trace amounts of potentially cancer-causing chemicals — dioxane and a substance called quaternium-15 that releases formaldehyde — from Johnson's Baby Shampoo, one of its signature products.

Johnson & Johnson has said it is reducing or gradually phasing out the chemicals.